| Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1 | /* Map C struct members to Python object attributes */ |
| 2 | |
| 3 | #include "allobjects.h" |
| 4 | |
| 5 | #include "structmember.h" |
| 6 | |
| 7 | object * |
| 8 | getmember(addr, mlist, name) |
| 9 | char *addr; |
| 10 | struct memberlist *mlist; |
| 11 | char *name; |
| 12 | { |
| 13 | struct memberlist *l; |
| 14 | |
| 15 | for (l = mlist; l->name != NULL; l++) { |
| 16 | if (strcmp(l->name, name) == 0) { |
| 17 | object *v; |
| 18 | addr += l->offset; |
| 19 | switch (l->type) { |
| 20 | case T_SHORT: |
| 21 | v = newintobject((long) *(short*)addr); |
| 22 | break; |
| 23 | case T_INT: |
| 24 | v = newintobject((long) *(int*)addr); |
| 25 | break; |
| 26 | case T_LONG: |
| 27 | v = newintobject(*(long*)addr); |
| 28 | break; |
| 29 | case T_FLOAT: |
| 30 | v = newfloatobject((double)*(float*)addr); |
| 31 | break; |
| 32 | case T_DOUBLE: |
| 33 | v = newfloatobject(*(double*)addr); |
| 34 | break; |
| 35 | case T_STRING: |
| 36 | if (*(char**)addr == NULL) { |
| 37 | INCREF(None); |
| 38 | v = None; |
| 39 | } |
| 40 | else |
| 41 | v = newstringobject(*(char**)addr); |
| 42 | break; |
| 43 | case T_OBJECT: |
| 44 | v = *(object **)addr; |
| 45 | if (v == NULL) |
| 46 | v = None; |
| 47 | INCREF(v); |
| 48 | break; |
| 49 | default: |
| 50 | err_setstr(SystemError, "bad memberlist type"); |
| 51 | v = NULL; |
| 52 | } |
| 53 | return v; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | err_setstr(NameError, name); |
| 58 | return NULL; |
| 59 | } |
| 60 | |
| 61 | int |
| 62 | setmember(addr, mlist, name, v) |
| 63 | char *addr; |
| 64 | struct memberlist *mlist; |
| 65 | char *name; |
| 66 | object *v; |
| 67 | { |
| 68 | struct memberlist *l; |
| 69 | |
| 70 | for (l = mlist; l->name != NULL; l++) { |
| 71 | if (strcmp(l->name, name) == 0) { |
| 72 | if (l->readonly || l->type == T_STRING) { |
| 73 | err_setstr(RuntimeError, "readonly attribute"); |
| 74 | return -1; |
| 75 | } |
| 76 | addr += l->offset; |
| 77 | switch (l->type) { |
| 78 | case T_SHORT: |
| 79 | if (!is_intobject(v)) { |
| 80 | err_badarg(); |
| 81 | return -1; |
| 82 | } |
| 83 | *(short*)addr = getintvalue(v); |
| 84 | break; |
| 85 | case T_INT: |
| 86 | if (!is_intobject(v)) { |
| 87 | err_badarg(); |
| 88 | return -1; |
| 89 | } |
| 90 | *(int*)addr = getintvalue(v); |
| 91 | break; |
| 92 | case T_LONG: |
| 93 | if (!is_intobject(v)) { |
| 94 | err_badarg(); |
| 95 | return -1; |
| 96 | } |
| 97 | *(long*)addr = getintvalue(v); |
| 98 | break; |
| 99 | case T_FLOAT: |
| 100 | if (is_intobject(v)) |
| 101 | *(float*)addr = getintvalue(v); |
| 102 | else if (is_floatobject(v)) |
| 103 | *(float*)addr = getfloatvalue(v); |
| 104 | else { |
| 105 | err_badarg(); |
| 106 | return -1; |
| 107 | } |
| 108 | break; |
| 109 | case T_DOUBLE: |
| 110 | if (is_intobject(v)) |
| 111 | *(double*)addr = getintvalue(v); |
| 112 | else if (is_floatobject(v)) |
| 113 | *(double*)addr = getfloatvalue(v); |
| 114 | else { |
| 115 | err_badarg(); |
| 116 | return -1; |
| 117 | } |
| 118 | break; |
| 119 | case T_OBJECT: |
| 120 | XDECREF(*(object **)addr); |
| 121 | XINCREF(v); |
| 122 | *(object **)addr = v; |
| 123 | break; |
| 124 | default: |
| 125 | err_setstr(SystemError, "bad memberlist type"); |
| 126 | return -1; |
| 127 | } |
| 128 | return 0; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | err_setstr(NameError, name); |
| Guido van Rossum | 73531a3 | 1990-12-20 23:12:40 +0000 | [diff] [blame] | 133 | return -1; |
| Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 134 | } |